Try mode not working after publishing - what am I doing wrong! pls help

Hello there,

I have created a try mode scene. The first slide is an instruction slide and has a READY button for me to click to proceed with the try-steps.
When I preview it, it stops for my input and works perfectly. But when I publish it, it just keeps playing without waiting for my input. Is it an issue with publishing try-mode?

I thought that, and created another Try mode with a few clicks and just published it without touching anything. Still not working after publish but works in Preview. 

Needing some help/advice please?

Regards
Sheetal